2 files changed, 33 insertions, 0 deletions
diff --git a/testsuite/synth/issue1240/tb_issue3.vhdl b/testsuite/synth/issue1240/tb_issue3.vhdl
new file mode 100644
index 000000000..1725a3c6b
--- /dev/null
+++ b/testsuite/synth/issue1240/tb_issue3.vhdl
@@ -0,0 +1,31 @@
+entity tb_issue3 is
+end tb_issue3;
+
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+architecture behav of tb_issue3 is
+  signal i : integer := 0;
+  signal o : signed (3 downto 0);
+begin
+  dut: entity work.issue3
+    port map (i, o);
+
+  process
+  begin
+    i <= 0;
+    wait for 1 ns;
+    assert o = "0010" severity failure;
+
+    i <= 1;
+    wait for 1 ns;
+    assert o = "0011" severity failure;
+
+    i <= -1;
+    wait for 1 ns;
+    assert o = "0001" severity failure;
+
+    wait;
+  end process;
+end behav;
diff --git a/testsuite/synth/issue1240/testsuite.sh b/testsuite/synth/issue1240/testsuite.sh
index f63808fcc..f1e668a8b 100755
--- a/testsuite/synth/issue1240/testsuite.sh
+++ b/testsuite/synth/issue1240/testsuite.sh
@@ -5,6 +5,8 @@
 synth_failure issue1.vhdl -e
 synth_failure issue2.vhdl -e
 
+synth_tb issue3
+
 clean
 
 echo "Test successful"